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Browsing by Subject "aluminum"

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Aluminium localization in root tips of the aluminium-accumulating plant species buckwheat (Fagopyrum esculentum Moench)

Klug, Benjamin; Specht, André; Horst, Walter J. (Oxford : Oxford University Press, 2011)

Aluminium (Al) uptake and transport in the root tip of buckwheat is not yet completely understood. For localization of Al in root tips, fluorescent dyes and laser ablation inductively coupled plasma mass spectrometry ...
Comparison between the compressibilities of the zero field and composite-fermion metallic states of the two-dimensional electron system

Dorozhkin, S.I.; Smet, J.H.; von Klitzing, K.; Umansky, V.; Haug, Rolf J.; Ploog, K. (College Park, MD : American Physical Society, 2001)

We have studied the capacitance between a two-dimensional electron system and a gate of field-effect transistors, produced from three different wafers with a single remotely doped GaAs/AlxGa1-xAs heterojunction. In the ...
Contact Temperature Measurements on Hybrid Aluminum–Steel Workpieces in a Cross-Wedge Rolling Process

Merkel, Paulina; Kruse, Jens; Kriwall, Mareile; Behrens, Bernd-Arno; Stonis, Malte (Basel : MDPI, 2023)

The Collaborative Research Center 1153 is investigating a novel process chain for manufacturing high-performance hybrid components. The combination of aluminum and steel can reduce the weight of components and lead to lower ...
Fast dynamics of H2O in hydrous aluminosilicate glasses studied with quasielastic neutron scattering

Indris, Sylvio; Heitjans, Paul; Behrens, Harald; Zorn, Reiner; Frick, Bernhard (College Park, MD : American Physical Society, 2005)

We studied the dynamics of dissolved water in aluminosilicate glasses with the compositions NaAlSi3O8⋅0.3H2O, NaAlSi3O8⋅1.3H2O and Ca0.5AlSi3O8⋅1.3H2O using quasielastic neutron scattering. As shown by near-infrared ...
Investigations into Flux-Free Plasma Brazing of Aluminum in a Local XHV-Atmosphere

Klett, Jan; Bongartz, Benedict; Viebranz, Vincent Fabian; Kramer, David; Hao, Chentong; Maier, Hans Juergen; Hassel, Thomas (Basel : MDPI, 2022)

As a lightweight construction material, aluminum plays a key role in weight reduction and, thus, sustainability in the transport industry. The brazing of aluminum and its alloys is impeded by the natural passivating oxide ...
Laser-welded Dissimilar Steel-aluminum Seams for Automotive Lightweight Construction

Schimek, M.; Springer, A.; Kaierle, S.; Kracht, D.; Wesling, V. (Amsterdam : Elsevier B.V., 2012)

By reducing vehicle weight, a significant increase in fuel efficiency and consequently a reduction in CO 2 emissions can be achieved. Currently a high interest in the production of hybrid weld seams between steel and ...
Magnetic-field-induced singularities in spin-dependent tunneling through InAs quantum dots

Hapke-Wurst, I.; Zeitler, U.; Frahm, Holger; Jansen, A.G.M.; Haug, Rolf J.; Pierz, Klaus (College Park, MD : American Physical Society, 2000)

Current steps attributed to resonant tunneling through individual InAs quantum dots embedded in a GaAs-AlAs-GaAs tunneling device are investigated experimentally in magnetic fields up to 28 T. The steps evolve into strongly ...
Non-destructive Evaluation of Workpiece Properties along the Hybrid Bearing Bushing Process Chain

Fricke, Lara Vivian; Thürer, Susanne Elisabeth; Kahra, Christoph; Bährisch, Susanne; Herbst, Sebastian; Nürnberger, Florian; Behrens, Bernd-Arno; Maier, Hans Jürgen; Klose, Christian; Barton, Sebastian (New York, NY : Springer, 2022)

To combine the advantages of two materials, hybrid bulk metal workpieces are attractive for subsequent processes such as metal forming. However, hybrid materials rely on the initial bond strength for the effective transfer ...
One-pot synthesis of NiAl-CO3 LDH anti-corrosion coatings from CO2-saturated precursors

Liu, Yi; Yu, Tongwen; Cai, Rui; Li, Yanshuo; Yang, Weishen; Caro, Jürgen (Cambridge : Royal Society of Chemistry, 2015-03-19)

Anti-corrosive coatings based on layered double hydroxides (LDHs) have been considered as promising alternatives to conventional chromate-containing conversion coatings. Among various LDHs, carbonate-intercalated LDH ...
Physiological and molecular analysis of the interaction between aluminium toxicity and drought stress in common bean (Phaseolus vulgaris)

Yang, Zhong-Bao; Eticha, Dejene; Albacete, Alfonso; Madhusudana Rao, Idupulapati; Roitsch, Thomas; Horst, Walter Johannes (Oxford : Oxford Univ. Press, 2012-05)

Aluminium (Al) toxicity and drought are two major factors limiting common bean (Phaseolus vulgaris) production in the tropics. Short-term effects of Al toxicity and drought stress on root growth in acid, Al-toxic soil were ...
Shot noise in resonant tunneling through a zero-dimensional state with a complex energy spectrum

Nauen, A.; Hohls, Frank; Könemann, J.; Haug, Rolf J. (College Park, MD : American Physical Society, 2004)

We investigate the noise properties of a GaAs/AlxGa 1-xAs resonant-tunneling structure at bias voltages where the current characteristic is determined by single electron tunneling. We discuss the suppression of the shot ...
Shot noise in tunneling through a single quantum dot

Nauen, A.; Hohls, Frank; Maire, Niels; Pierz, Klaus; Haug, Rolf J. (College Park, MD : American Physical Society, 2004)

We investigate the noise properties of a zero-dimensional InAs quantum dot (QD) embedded in a GaAs-AlAs-GaAs tunneling structure. We observe an approximately linear dependence of the Fano factor and the current as a function ...

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